DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [08/2019 - ]: Description

The skid control ECU (brake actuator assembly) receives signals from the ECM, steering angle sensor, yaw rate and acceleration sensor (for TFT Meter Type) and airbag sensor assembly via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0074-88	Control Module Communication Bus "B" Off Bus Off	Any of the following is detected: A bus OFF state occurs once or more within 0.1 seconds, 10 times in succession. When the +BS terminal voltage is between 9.5 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues for 1 second or more. When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds: A delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor occurs once or more within 5 seconds.	CAN communication system
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 15 km/h (9 mph), data cannot be received from the ECM for 2 seconds or more.	CAN communication system ECM Skid control ECU (brake actuator assembly)
U0101-87	Lost Communication with TCM Missing Message	When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 15 km/h (9 mph), data cannot be received from the TCM (ECM) for 2 seconds or more.	CAN communication system TCM (ECM) Skid control ECU (brake actuator assembly)
U0125-87	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	Either of the following is detected: When the +BS terminal voltage is between 9.5 and 17.4 V, data from the acceleration sensor cannot be received for 1second or more. When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds: Data from the acceleration sensor cannot be received once or more within 5 seconds.	CAN communication system Acceleration sensor (airbag sensor assembly) (for Optitron Meter Type) Acceleration sensor (yaw rate and acceleration sensor) (for TFT Meter Type) Skid control ECU (brake actuator assembly)
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	Either of the following is detected: When the +BS terminal voltage is between 9.5 and 17.4 V, data from the steering angle sensor cannot be received for 1 second or more. When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds: Data from the steering angle sensor cannot be received once or more within 5 seconds	CAN communication system Steering angle sensor Skid control ECU (brake actuator assembly)
U0151-87	Lost Communication with Restraints Control Module Missing Message	When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 7 km/h (4 mph), data cannot be received from the airbag sensor assembly for 5 seconds or more.	CAN communication system Airbag sensor assembly Skid control ECU (brake actuator assembly)

DTC DETECTION CONDITIONS: U0074-88

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	When the +BS terminal voltage is between 9.5 and 17.4 V	-	◦	◦
Malfunction Status	A bus OFF state occurs once or more	◦	-	-
	A delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues	-	◦	-
	A delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor occurs once or more within 5 seconds	-	-	◦
Detection Time		Within 0.1 seconds, 10 times in succession	1 second or more	10 times in succession within 60 seconds
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for any of the patterns in the table above are met.

DTC DETECTION CONDITIONS: U0125-87

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	When the +BS terminal voltage is between 9.5 and 17.4 V	◦	◦
Malfunction Status	Data from the acceleration sensor cannot be received	◦	-
Malfunction Status	Data from the acceleration sensor cannot be received once or more within 5 seconds	-	◦
Detection Time		1 second or more	10 times in succession within 60 seconds
Number of Trips		1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC DETECTION CONDITIONS: U0126-87

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	When the +BS terminal voltage is between 9.5 and 17.4 V	◦	◦
Malfunction Status	Data from the steering angle sensor cannot be received	◦	-
Malfunction Status	Data from the steering angle sensor cannot be received once or more within 5 seconds	-	◦
Detection Time		1 second or more	10 times in succession within 60 seconds
Number of Trips		1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.